{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["message topic", "member collection"], "input": "this poster advertises the 1898 exhibition of the shroud ."}
{"message topic": [{"subject": "poster", "object": "exhibition"}], "member collection": []}